JP3687316B2 - Centering jig and measuring device using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a circular hole centering jig and a measuring apparatus using the same, and more particularly to a flange hole and bolt hole centering jig and a measuring apparatus using the same.
[0002]
[Prior art]
In piping construction in facilities, there are often installation errors and manufacturing errors between the installation of equipment and tanks and the piping connected to them, and the installation status of equipment and tanks etc. is accurately measured before piping construction. There is a need to. However, since it is difficult to accurately measure the installation status using hand tools such as a metal ruler or swinging down, the current situation is to cope with the piping site. That is, instead of manufacturing piping according to the installation status of equipment, tanks, etc., piping is performed by cutting and welding existing piping according to the installation status at the installation site. However, such a method not only increases the number of work on site, but also causes problems such as leakage from the welded part, and causes a serious accident especially in a nuclear power plant.
[0003]
Against this background, the so-called prefabs are used to accurately measure installation conditions and manufacturing errors of equipment, tanks, etc., manufacture piping at the factory based on the measured values, and only assemble the piping at the site. It is desirable to perform construction. Therefore, in order to obtain the position and orientation of the flange necessary for piping construction, attempts have been made to measure the flange hole center, flange surface angle, and bolt hole swing angle using a three-dimensional position measuring instrument. FIG. 11 shows the measurement status. As shown in the figure, a reflecting prism, which is a target 3 of the three-dimensional position measuring device, is disposed on the outer peripheral portion of the flange 2, and the three-dimensional position measuring device 1 has a measurement point P of the target 3. Is irradiated with infrared rays L, the coordinates of the measurement point P of the target 3 are measured, and the flange center FO, the flange surface angle, the bolt hole center BO, and the like are obtained from the measurement point P. FIG. 12 shows the installation status of the target 3, and the target 3 is installed at six locations. In the figure, the targets 3A to 3C are installed to calculate the flange center FO and the flange surface angle, and the targets 3D to 3F are bolt hole centers for calculating the bolt hole swing angle of the flange fastening bolt hole. It is installed to calculate BO. At this time, the targets 3A to 3F are attached to the flange 2 with magnets.
[0004]
[Problems to be solved by the invention]
However, the method of attaching the target to the flange with a magnet has a drawback in that it is very difficult to accurately align with the measurement position of the flange, and it takes a lot of time to find the center of the flange hole and the center of the bolt hole. . Moreover, since it cannot attach to a nonmagnetic flange, there existed a fault that a flange cannot be measured using a three-dimensional position measuring device.
[0005]
Further, in the conventional method, since the target is disposed on the flange surface, there is a disadvantage that the three-dimensional position measuring device must be installed at a position where the entire flange surface can be visually observed.
Due to these drawbacks, flange measurement using a three-dimensional position measuring instrument has not been sufficiently put into practical use.
[0006]
The present invention has been made in view of such circumstances, and a target having a measurement point can be easily and accurately attached to a flange, and the position and posture of the flange can be accurately measured with a three-dimensional position measuring instrument. An object of the present invention is to provide a centering jig capable of handling even when there is an obstacle between the flange and the three-dimensional position measuring instrument and a measuring apparatus using the centering jig.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned object, the present invention is a centering jig for centering a circular hole that vertically penetrates both surfaces whose front and back surfaces are parallel to each other, and is in contact with one surface side of the both surfaces. A reference surface setting member that forms a surface parallel to the one surface; A contact assisting member mounted on the reference surface setting member and provided with a rotatable bearing at the tip, and the bearing abutting against the one surface; The reference surface setting member is supported perpendicularly to the reference surface, and is inserted into a rod-shaped member inserted from one side of the circular hole to the other surface side, and a top-shaped main body having a top shape. So that the center line of the top type body and the center line of the bar-shaped member coincide with each other with the conical surface of the top type body facing the reference surface of the reference surface setting member. A top-type member that is slidably fitted into the rod-shaped member, a target member that is supported by the reference plane setting member and has a measurement point on a center line of the rod-shaped member, the reference plane setting member, and the top-panel type And sandwiching means for sandwiching both sides of the circular hole with a member.
[0008]
In order to solve the above-mentioned object, the present invention provides a measuring apparatus for measuring the position and orientation of a flange attached to a device such as a tank. A centering jig for centering a circular hole that vertically penetrates both surfaces of which the front surface and the back surface are parallel to each other, abutting on one side of the both surfaces to form a surface parallel to the one surface A reference surface setting member, a rod-like member that is supported perpendicularly to the reference surface by the reference surface setting member, and is inserted from one side of the circular hole to the other side, and a top-of-the-game body having a top shape Is arranged on the other surface side of both surfaces of the circular hole, and the center line of the top of the top of the top of the top of the top of the top of the top of the top of the rod and the center of the bar A top-type member that is slidably fitted into the rod-shaped member so that the line coincides, a target member that is supported by the reference surface setting member and has a measurement point on a center line of the rod-shaped member, and the reference surface A pinch that sandwiches both sides of the circular hole between the setting member and the top type member Only a means, consists of, Attach to each of the three bolt holes on the flange Core An alignment jig, 3D position measurement means for measuring 3D coordinates of each measurement point of the target provided on each alignment jig, and 3D of each measurement point measured by the 3D position measurement means And calculating means for calculating the position and orientation of the flange based on the coordinates.
[0009]
Furthermore, in order to solve the above-mentioned object, the present invention provides a centering jig attached to the flange for measuring the position and posture of the flange attached to a device such as a tank, and abuts against the flange surface of the flange. A jig body comprising a reference surface portion forming a reference surface and a shaft portion supported by the reference surface portion and parallel to the flange surface, a reference surface portion contacting the flange surface of the flange to form a reference surface, and the A vertical column perpendicular to the reference surface portion, and a slide member that is slidably supported by the shaft portion of the jig body, and is supported on each reference surface side of the jig body and the slide member, and A pair of roller members each having a rotation axis perpendicular to each reference plane, and one each of the jig main body and the slide member are provided, and the positional relationship between the measurement point and the pair of roller members is determined in advance. A pair of fixed targets, a target provided on any one of the jig body and the slide member, the measurement point of which forms a plane in space together with the measurement points of the pair of targets, and the jig body Sliding means for sliding the slide member along the shaft portion of the flange, and inserting the pair of rollers into a pair of bolt holes of the flange facing each other across the flange hole center of the flange, The slide member is slid in a direction in which the jig body is brought close to the jig body, and is sandwiched between the pair of bolt holes by the pair of rollers and attached to the flange.
[0010]
Furthermore, in order to solve the above-mentioned object, the present invention provides a measuring apparatus for measuring the position and posture of a flange attached to a device such as a tank, and the centering jig according to claim 3 attached to the flange. Three-dimensional position measuring means for measuring the three-dimensional coordinates of each measurement point of the target provided in the centering jig; and the position of the flange based on the coordinates of each measurement point measured by the three-dimensional position measurement means And a calculation means for calculating the posture.
[0011]
According to the centering jig of the first aspect of the present invention, the rod-shaped member of the reference surface setting member disposed on one side surface of the circular hole is inserted into the circular hole, and the rod-shaped member is disposed on the other side surface of the circular hole. The target point of measurement of the target is positioned on the core of the circular hole only by inserting the top type main body of the set top type member and sandwiching both sides of the circular hole between the reference surface setting member and the top type member. According to the centering device of claim 2 of the present invention, each of the three bolt holes of the flange is provided with the centering device. Core An alignment jig is installed, the three-dimensional coordinates of the measurement points of each target of the alignment jig are measured by the three-dimensional position measurement means, and the position and orientation of the flange are calculated by the calculation means from the three-dimensional coordinates of each target. .
[0012]
According to the centering jig of claim 3 of the present invention, the pair of roller members of the jig body and the slide member are inserted into the pair of bolt holes of the flange facing each other through the flange hole center of the flange, and the slide By simply sliding the slide member in the direction to bring the jig body close to the jig body, the pair of rollers sandwiching the pair of bolt holes and attaching the centering jig to the flange, the measurement points of the three targets It is positioned at an appropriate position for measuring the position and posture of the camera.
[0013]
According to the centering device of claim 4 of the present invention, the centering jig according to claim 3 is attached to the flange, and the three-dimensional coordinates of the measurement points of each target of the centering jig are obtained by the three-dimensional position measuring means. Measure and calculate the position and orientation of the flange from the three-dimensional coordinates of each target by the calculation means.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of a centering jig according to the present invention and a measuring apparatus using the same will be described in detail with reference to the accompanying drawings.
FIG. 1 is an explanatory diagram for explaining the overall configuration of a first embodiment of a measuring apparatus according to the present invention.
[0015]
As shown in the figure, the measuring apparatus 10 mainly includes three centering jigs 22 for setting a target 24 on the flange 12 and a three-dimensional position for measuring three-dimensional coordinates of each measurement point 24P of the target 24. The measuring device 18 includes a calculator 20 that calculates the position and orientation of the flange from the three-dimensional coordinates of each measured measurement point 24P.
The three-dimensional position measuring device 18 emits a light beam L to a target 24 that is a reflecting prism, and obtains the distance to the target 24 by measuring the wavelength of the light beam reflected by the target 24, and the horizontal angle of the emitted light beam. And a known device that measures the three-dimensional coordinates of the target 24 by determining the vertical angle.
[0016]
FIG. 2 is an explanatory view for explaining the structure of the centering jig 22.
As shown in the figure, the centering jig 22 is composed of a reference surface setting member 26 and a top-type member 40, and a reference surface that abuts the flange surface 12a on the surface receiving plate 28 of the reference surface setting member 26. 28a is formed in a circular shape. The reference surface 28a is a smooth surface, and when the surface roughness of the flange surface 12a is small, the reference surface setting member 26 can be moved while abutting. On the reference surface 28a, a contact assisting member 32 provided with a rotatable bearing at the tip is detachable. That is, when the surface roughness of the flange surface 12a is large, the three contact assisting members 32 are attached to the reference surface 12a, and the bearing is in contact with the flange surface 12a. As a result, the reference surface 28a is set parallel to the flange surface 12a and the frictional force with the flange surface 12a is small, so that the reference surface setting member 26 can be smoothly translated relative to the flange surface 12a.
[0017]
In addition, a cylindrical rod-shaped member 38 is installed in the center of the reference surface 28a of the surface receiving plate 28 in a direction perpendicular to the reference surface 28a, and a male screw is provided on the peripheral surface.
On the opposite side of the reference surface 28 a of the surface receiving plate 28, the target 24 is installed via the support member 30, and the measurement point 24 </ b> P is formed on the extension of the center line 36 of the rod-shaped member 38. The target 24 is pivotally supported by a bearing 30c, and a base 30b on which the bearing 30c is installed is pivotally supported by a support column 30a. Thereby, the target 24 can be directed in all directions, that is, the light beam of the three-dimensional position measuring device 18 can be reliably reflected to the three-dimensional position measuring device 18. Further, the support column 30a is extendable, and a distance L (see FIG. 3) from the reference plane 28a to the measurement point 24P of the target 24 can be set according to the situation. That is, when the measurement point 24P cannot be directly seen from the three-dimensional position measuring device 18 due to an obstacle or the like, the support column 30a is extended to a position where it can be seen.
[0018]
On the other hand, in the top type member 40, the male screw 42 a formed on the outer peripheral surface side of the cylindrical shaft member 42 is screwed with the internal screw inside the nut member 48 via the top type main body 44 and the conical roller bearing 46. Is formed. On the inner peripheral surface side of the shaft member 42, a female screw that is screwed with a male screw of the rod-shaped member 38 of the reference surface setting member 26 is provided. A part of the top type main body 44 has a truncated cone shape, and is rotatably supported by the conical roller bearing 46 with respect to the shaft member 42 and the nut member 48. Further, by the action of the conical roller bearing 46, the center lines of the top type main body 44, the shaft member 42, the conical roller bearing 46, and the nut member 48 are formed to be surely aligned. Thereby, when the rod-shaped member 38 and the shaft member 42 are screwed together, that is, when the reference plane setting member 26 is fixed by the drum-type member 40, the center line of the drum-type main body 44 is aligned with the center line 36 of the rod-shaped member 38. Match.
[0019]
Next, the operation of the first embodiment of the measuring apparatus according to the present invention configured as described above will be described.
FIG. 3 is an explanatory view for explaining the operation of the first embodiment of the measuring apparatus according to the present invention, and shows a state in which the centering jig 22 is installed in the bolt hole 16 of the flange 12. The figure shows a case where the surface roughness of the flange surface 12a is large, and abuts against the flange surface 12a using the contact assisting member 32.
[0020]
First, the rod-shaped member 38 of the reference surface setting member 26 is inserted into the bolt hole 16 from the flange surface 12a side, and the bearing of the contact assisting member 32 is brought into contact with the flange surface 12a. As a result, the reference surface 28a is set parallel to the flange surface 12a, and the center line 36 of the rod-shaped member 38 is formed perpendicular to the flange surface 12a.
Next, the reference surface setting member 26 is fixed by the top-of-the-piece member 40 from the back surface 12 b side of the flange 12. That is, the male screw of the rod-shaped member 38 inserted through the bolt hole 16 is screwed into the female screw of the bearing 42 of the top-type member 40. By screwing in, the reference surface setting member 26 moves smoothly in parallel with the flange surface 12a, and the peripheral surface 44a of the truncated cone portion of the top type main body 44 has a circle formed by the bolt hole 16 on the back surface 12b and its Abuts the entire circumference. Since the top type main body 44 is rotatably supported by the bearing 42 and the nut member 48, it is further screwed in after the peripheral surface 44 a abuts, and the reference surface setting member 26 and the top type member 40 form a bolt hole. 16 sides can be sandwiched. In this clamping, the center line 36 of the rod-shaped member 38 and the core of the bolt hole 16 are surely aligned with each other by the action of the truncated cone portion of the top type main body 44, and the measurement point 24P of the target 24 is on the core of the bolt hole 16. Be placed.
[0021]
Similarly, by setting the centering jig 22 in each of the three bolt holes 16, the measurement points 24 </ b> P of the target 24 are respectively arranged on the cores of the three bolt holes 16.
The three-dimensional coordinate of the measurement point 24P of each target 24 arranged in this way is measured using the three-dimensional position measuring device 18. The measured data is sent to the computing unit 20, and the position and orientation of the flange 12 necessary for piping construction are calculated. That is, since the measurement point 24P is a point on the core of the bolt hole 16, by calculating a plane passing through the three measurement points 24P, the bolt hole center 16a separated from the measurement point 24P by L (see FIG. 3). Can be requested. Further, the flange hole center is simply calculated from the positions of the three bolt hole centers 16a.
[0022]
Thus, according to the first embodiment of the present invention, the measuring point 24P of the target 24 is automatically placed on the core of the bolt hole 16 simply by installing the centering jig 22 in the bolt hole 16. Can be positioned. For this reason, the mounting operation of the target 24 can be easily performed, and the measurement point 24P of the target 24 can be reliably installed at the measurement position. Therefore, by measuring the three-dimensional coordinates of the measurement point 24P of the target 24 by the three-dimensional position measuring device 18, the installation status of the piping and the like can be accurately measured. Further, when the entire flange surface 12a cannot be confirmed from the three-dimensional position measuring device 18, the position and orientation of the flange can be measured by extending the support column 30a to a position where the measurement point 24P can be confirmed.
[0023]
In the above-described embodiment, one target 24 is disposed on the center line 36 of the rod-shaped member 38. However, the present invention is not limited to this. If the positional relationship with the bolt hole center 16a is known, a surface bearing may be used. It may be arranged anywhere with respect to the plate 28 and any number may be arranged. Further, by arranging two targets 24 on the center line of the rod-shaped member 38 or three targets 24 on one jig, only one centering jig is installed. The core can be determined.
[0024]
Moreover, in said 1st Embodiment, although the measuring apparatus and the centering jig | tool were used in order to measure the installation condition of the flange of piping, it can be used in various situations which ask | require the core of a circular hole. . For example, FIG. 4 is an explanatory diagram for explaining a modification of the first embodiment. In the figure, a state is shown in which a sleeve 50 for passing a pipe 52 is temporarily provided by a support member 54 on a wall frame 56 before flowing a wall material such as concrete. Since the centering jig used for centering the sleeve 50 is the same as the centering jig 22 used in the first embodiment, the description of the centering jig 22 is omitted.
[0025]
The sleeve 50 is formed in a cylindrical shape through which the pipe 52 passes, and is temporarily installed such that the cores of the sleeves 50, 50,. The centering jig 22 with the contact assisting member 32 removed is installed in the hollow portion of the sleeve 50 in the same manner as in the first embodiment. Thereby, the measurement point 24P of each target 24 is installed on the core of each sleeve 50. This measurement point 24P is measured by the three-dimensional position measuring device 18, and the position of each measurement point 24P is calculated by the calculator 20, thereby determining whether or not each measurement point 24P is aligned on a straight line. By arranging all the measurement points 24P on a straight line, each sleeve 50 can be temporarily set on the straight line accurately.
[0026]
FIG. 5 is an explanatory diagram for explaining the overall configuration of the second embodiment of the measuring apparatus according to the present invention.
As shown in the figure, the measuring apparatus 60 according to the second embodiment includes a centering jig 62 that arranges three targets 64 outside the flange 12, and a three-dimensional measurement point 70 of each target 64. A three-dimensional position measuring device 18 that measures coordinates and a calculator 20 that calculates the position and orientation of the flange 12 from the three-dimensional coordinates of the measured measurement point 70 are configured.
[0027]
FIG. 6 is an explanatory view illustrating the configuration of the centering jig 62. In FIG. 5, the example in which the measurement points 70A, 70B, and 70C are arranged on a plane parallel to the flange surface 12a has been described. However, in FIG. 6, the measurement points 70A, 70B, and 70C are perpendicular to the reference surface 66a. A description will be given by using an example of arranging on a plane.
As shown in FIG. 6, the jig body 66 of the centering jig 62 is in contact with the flange surface 12 a of the flange 12 to form a reference surface 67 a, and the reference surface portion 67 is parallel to the reference surface 67 a. The shaft portion 68 is supported by the shaft portion 68. A slide member 76 is supported on the shaft portion 68 so as to be slidable in the direction of the center line 80 of the shaft portion 68, and engages with a nut member 69 screwed into a screw portion 68 a of the shaft portion 68. Thereby, the slide member 76 can be slid by tightening the nut member 69. The slide member 76 is formed by a reference surface portion 77 that forms a reference surface 77a, and a vertical column 78 that is supported by the reference surface portion 77 perpendicularly to the reference surface 77a. The reference surface 77a of the slide member 76 is on the same plane as the reference surface 67a of the jig body 66, and contacts the flange surface 12a together with the reference surface 67a.
[0028]
A pair of rollers 74 </ b> A and 74 </ b> B are rotatably supported on the center line 80 of the shaft portion 68 on the reference surface 67 a of the jig body 66 and the reference surface 77 a of the slide member 76.
Targets 64 </ b> A and 64 </ b> B are respectively provided at the tip of the shaft portion 68 and the lower end portion of the vertical column 78, and straight lines passing through the measurement points 70 </ b> A and 70 </ b> B of the targets form straight lines parallel to the center line 80. Thereby, the amount of change in the distance between the measurement points 70A and 70B of each target when the slide member 76 is slid is proportional to the amount of change in the distance between the pair of rollers 74A and 74B. Accordingly, a midpoint 84P (see FIG. 8) of points 84A and 84B where the rotation axes of the rollers 74A and 74B intersect the reference planes 66A and 66B, respectively, and a midpoint 70P (see FIG. 8) of the measurement points 70A and 70B. The positional relationship is always equal. The target 64C is provided at the upper end of the vertical column 78 of the slide member 76, and straight lines passing through the measurement point 70C of the target 64C and the measurement point 70B of the target 64B form normal lines of the reference surfaces 67a and 77a. Each target is installed so that it can be directed in any direction as in the first embodiment.
[0029]
Next, the operation of the measuring apparatus using the centering jig configured as described above will be described.
7 and 8 are explanatory views for explaining the operation of the second embodiment of the centering device. FIG. 7 is a top view, and FIG. 8 is a side view showing only the flange in a sectional view.
[0030]
First, the rollers 74A, 74B are inserted into the bolt holes 16A, 16B facing each other across the flange center 14P from the flange surface 12a side, and the reference surface 67a of the jig body 66 and the reference surface 77a of the slide member 76 are connected to the flange surface. 12a abuts. The nut member 69 is rotated to slide the slide member 76, and the peripheral surfaces 82A and 82B of the respective bolt holes are clamped by the rollers 74A and 74B. Thereby, the centering jig 62 is attached to the flange 12. In this attachment, since the rollers 74A and 74B are rotatably supported, the frictional resistance between the rollers 74A and 74B and the peripheral surfaces 82A and 82B is reduced, and the peripheral surfaces 82A and 82B that are in contact with the rollers 74A and 74B are surely reduced. The flange 12 is clamped so that the distance is minimized. Accordingly, the centering jig 62 is installed so that the center line 80 of the shaft portion passes through the cores of the bolt holes 16A and 16B and the flange hole 14, and the midpoint 84P of the 84A and 84B and the flange hole center 14P coincide. To do.
[0031]
Next, the positions of the measurement points 70 </ b> A, 70 </ b> B, 70 </ b> C of the targets arranged on the flange 12 are measured using the three-dimensional position measuring device 18. The measured data is sent to the calculator 20 and the position and orientation of the flange 12 are calculated. That is, the position of the midpoint 70P is obtained from the measurement points 70A and 70B, the point moved L1 in the linear direction passing through the measurement points 70B and 70C, and the point moved L2 in the straight direction passing through the measurement points 70A and 70B is the midpoint 84P, that is, It becomes the flange hole center 14P. Moreover, since the straight line passing through the measurement points 70B and 70C is a normal line of the flange surface 12a, the surface angle of the flange 12 can be obtained.
[0032]
As described above, according to the second embodiment of the present invention, the measurement points 70A, 70B, and 70C of each target obtain the position and orientation of the flange 12 only by attaching the centering jig 62 to the flange 12. It is automatically positioned at a suitable position. In addition, since the target can be arranged outside the flange surface 12a, the position and orientation of the flange 12 can be measured even in a narrow place where the entire flange surface 12a cannot be confirmed from the three-dimensional position measuring device 18.
[0033]
In the above-described embodiment, the installation positions of the targets 64A, 64B, and 64C can be changed. For example, with respect to the installation positions of the targets 64A and 64B, any position may be used as long as the change amounts of the measurement points 70A and 70B of the targets correspond to the change amount of the distance between the pair of rollers 74A and 74B. Further, the target 64C may be placed anywhere as long as it forms a plane with the targets 64A and 64B that is clearly related to the reference surfaces 67a and 77a.
[0034]
In the above-described embodiment, the centering jig 62 is installed in the flange 12 by sandwiching the bolt hole 16 with the pair of rollers 74. However, the present invention is not limited to this, and the center line of the shaft portion 68 is not limited thereto. As long as 80 can be reliably installed so as to pass through the cores of the bolt holes 16A and 16B, it may be installed by any method.
In the above-described embodiment, the measuring device 60 is used to measure the installation state of the flange 12 of the pipe. However, the measuring device 60 can be used in various situations where the measurement point cannot be visually observed from the three-dimensional position measuring device 18. it can. For example, FIG. 9 is an explanatory diagram for explaining a modification of the second embodiment, and shows a state in which a measurement point cannot be viewed from the three-dimensional position measuring device 18 by an obstacle 88 such as a tank. FIG. 10 is a schematic structural diagram of a measuring jig used in the modification of FIG.
[0035]
As shown in FIG. 10, the measuring jig 90 includes a jig main body 92 and a slide member 94. A target 96A is installed at one end of the jig main body 92, and a support needle 98A is provided at the other end. It has been. Similarly, the slide member 94 is provided with a target 96B at the tip on the target 96A side and a support needle 98B at the other end. Further, the measurement points 97A and 97B of each target are arranged on a straight line connecting the tips 99A and 99B of the support needles 98A and 98B. Thereby, the amount of change in the distance between the measurement points 97A and 97B when the slide member 94 is slid is proportional to the amount of change in the distance between the tips of the indicating needles 98A and 98B. Accordingly, by applying the tips of the support needles 99A and 99B to the two points to be measured and measuring the positions of the measurement points 97A and 97B with a three-dimensional position measuring device, The position and the distance between the two points can be calculated.
[0036]
【The invention's effect】
As described above, according to the centering jig and the measuring apparatus using the same according to the present invention, the target measuring point is suitable for measurement only by attaching the centering jig on which the target is supported to the flange. It is automatically positioned at the selected position. Thereby, the mounting operation of the target can be performed quickly and accurate measurement by the three-dimensional position measuring device can be performed. Further, the centering jig can be attached regardless of the material of the flange. Furthermore, it is possible to perform a measurement operation in a narrow place where the entire flange surface cannot be confirmed from the three-dimensional position measuring instrument.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a first embodiment of a measuring apparatus according to the invention.
FIG. 2 is a configuration diagram of a centering jig according to the first embodiment of the present invention.
FIG. 3 is an explanatory diagram for explaining the operation of the first embodiment of the measuring apparatus according to the present invention.
FIG. 4 is an explanatory diagram for explaining a modification of the first embodiment according to the present invention.
FIG. 5 is an overall configuration diagram of a second embodiment of a measuring apparatus according to the present invention.
FIG. 6 is a configuration diagram of a centering jig according to a second embodiment of the present invention.
FIG. 7 is an explanatory diagram (top view) for explaining the operation of the second embodiment of the measuring apparatus according to the present invention.
FIG. 8 is an explanatory view (side view) for explaining the operation of the second embodiment of the measuring apparatus according to the present invention.
FIG. 9 is an overall configuration diagram showing a modification of the second embodiment according to the present invention.
10 is an overall configuration diagram of the centering jig in FIG. 9;
FIG. 11 is an explanatory diagram of a conventional measuring apparatus.
FIG. 12 is an explanatory diagram of a conventional measuring apparatus.
[Explanation of symbols]
12 ... Flange
12a ... Flange surface
14 ... Flange hole
16 ... Bolt hole
18 ... 3D position measuring instrument
20 ... Calculator
22 ... Centering jig (first embodiment)
24 ... Target (first embodiment)
24P ... Measurement point (first embodiment)
26: Reference plane setting member
28a ... reference plane (first embodiment)
38 ... Rod-shaped member
40. Top member
44a ... Conical peripheral surface
62 ... Centering jig (second embodiment)
64 ... Target (second embodiment)
66 ... Jig body
67 ... Reference plane part
67a ... reference plane (second embodiment)
68 ... Shaft
70 ... Measurement point
74 ... Laura
76 ... Slide member
77 ... Reference plane
77a ... reference plane (second embodiment)
78 ... Vertical pillar

Claims (4)

A centering jig for centering a circular hole that vertically penetrates both surfaces whose front and back surfaces are parallel to each other ,
A reference surface setting member that is in contact with one side of the both surfaces to form a surface parallel to the one surface;
A contact assisting member mounted on the reference surface setting member and provided with a rotatable bearing at the tip, and the bearing abutting against the one surface;
A rod-like member that is supported by the reference surface setting member perpendicularly to the reference surface and is inserted from one side of the circular hole to the other side;
A top type main body having a top shape is arranged on the other side of both sides of the circular hole, and the center of the top type main body is arranged with the conical surface of the top type main body facing the reference surface of the reference surface setting member. A top-type member that is slidably fitted into the rod-shaped member so that a line and a center line of the rod-shaped member coincide with each other;
A target member supported by the reference plane setting member and having a measurement point located on the center line of the rod-shaped member;
A centering jig comprising: clamping means for clamping both sides of the circular hole between the reference surface setting member and the top-piece type member. In a measuring device for measuring the position and orientation of a flange attached to a device such as a tank, a centering jig for centering a circular hole that vertically penetrates both surfaces whose front and back surfaces are parallel to each other, A reference surface setting member that abuts on one side of both surfaces to form a surface parallel to the one surface, and is supported by the reference surface setting member perpendicularly to the reference surface, and one surface of the circular hole A rod-shaped member inserted from the side to the other surface side and a top-shaped main body having a top shape are arranged on the other surface side of both sides of the circular hole, and the conical surface of the top-type main body is a reference of the reference plane setting member A top-type member that is slidably fitted to the rod-shaped member so that a center line of the top-type body coincides with a center line of the rod-shaped member in a state of being opposed to the surface, and is supported by the reference surface setting member. The target where the measurement point is located on the center line of the rod-shaped member A member and made, and the pinching means pinching both sides of the circular hole in said top mold member and the reference plane setting member, each of the three bolt holes to install them core Dechi instrument of the flange,
3D position measuring means for measuring 3D coordinates of each measurement point of the target provided in each centering jig;
Computing means for computing the position and orientation of the flange based on the three-dimensional coordinates of each measurement point measured by the three-dimensional position measuring means;
A measuring device comprising: In a centering jig attached to the flange in order to measure the position and orientation of the flange attached to a device such as a tank,
A jig body composed of a reference surface portion that contacts the flange surface of the flange to form a reference surface, and a shaft portion that is supported by the reference surface portion and is parallel to the flange surface;
A reference member that forms a reference surface in contact with the flange surface of the flange, and a vertical column that is perpendicular to the reference surface portion, and a slide member that is slidably supported on the shaft portion of the jig body;
A pair of roller members that are supported on each reference surface side of the jig body and the slide member, and whose rotation axis is perpendicular to each reference surface,
A pair of targets each provided on the jig body and the slide member, the positional relationship between the measurement point and the pair of roller members is set in advance;
A target that is provided on any one of the jig body and the slide member, and whose measurement points form a plane in space together with the measurement points of the pair of targets;
Slide means for sliding the slide member along the shaft portion of the jig body;
The pair of rollers are inserted into a pair of bolt holes of the flanges facing each other across the flange hole center of the flange, and the slide member is slid in a direction to bring the slide member close to the jig body. A centering jig, wherein the pair of rollers is attached to the flange while being sandwiched between the pair of bolt holes.   In the measuring apparatus which measures the position and attitude | position of the flange attached to apparatuses, such as a tank, the centering jig | tool attached to the said flange and each measurement point of the target provided in each said centering jig 3D position measuring means for measuring 3D coordinates, and calculating means for calculating the position and orientation of the flange based on the coordinates of each measurement point measured by the 3D position measuring means. Measuring device.

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